Believe it or not, there is it least ONE (perhaps more) Class 1 RR that I have heard of that have a reputation for NOT wanting to hire experienced railoroad employees. The general thought is that they wish to train their employees THEIR way, and that it is easier to to that, than to get new employees to re-adjust to their ways.
While I do NOT agree with this logic, i can at least see where they are coming from, having seen many employees (myself included) having readjustment problems when coping witha "new" railroad.
Years ago, when a passenger rail agency took over a particular ticket office, I witnessed a particular experienced and qualified employee being turned down for a particular "off-the-street" hiring slot. The story is complicated and I shant get into names and places but I will add the following:
The person who WAS hired for this job could barely speak English, he took a bath once a month or so, and eventually quit in a few months. A few months later, the above "rejected" candidate was hired in another department as a grandfathered incumbent. He was eventually "discovered", brought into management, had an illustrious career with the outfit, eventually becoming a General Manager, and eventually (30 years later) left to go to another passenger agency, where he is earning a VERY substantial stipend. Go figure